Though each colliery has to give its indents for purchase of explosives, detonators etc. as per the requirement but the fixed quantity has been given in the schedule appended to this order. The transit insurance was to be borne by the collieries. The mode of dispatches was also mentioned. It further says that excess supply made, if any, shall be acceptable to the extent of 15% over the quantities against each item in respect of each area as indicated in Schedules I to IV. The price is firm for contract period. Then there is a clause of price variation also. The respective General Managers are to be contacted for monthwise allocation of explosives. IDL Chemicals Limited, and/or their consignment agents, namely, (i) M/s. B.P.Agarwalla & Sons (P) Ltd., P.O.Dhansar, DistDhanbad, (ii) M/s. William Jacks & Co (India) Pvt. Ltd. Asansol/ Calcutta, and (iii) Abdul Hussain Mulla Allabuxji, Nagpur (Maharashtra), will supply explosives and accessories to mines on the basis of convenience and locations against this order. Mines will follow the existing system of drawing their requirements from IDL and/or their consignment agents who will raise the bills accordingly and payments will be made by cheques drawn in favour of IDL Chemicals Ltd. Instructions contained in the attached Schedule VI should be strictly and invariably followed.